Boiler and other furnace.



I. HEAGAN.

sonia AND omis FunNAcE.

APPLICATION FILED MAY 5. 1916. 1,210,364. Patented D00. 26, 1916.

2 SHETS SHET l.

J. REAGAN.

BOILER AND 01111211 FURNACE.

APPLICATION FILED MAY 5.

'm' Patented Deo. 26,1916.

2 SHEETS-SHEET 2- if." .Th uppermost ste 50 head block.-

UNITED STATES JAMES REAGAN, F PHILADELPHIA, PENNSYLVANIA.

noILEn AND OTHER FURNACE.

Specification of Letters Patent.

Patented Dec. ze, 1916.

Application led May I 1916. Serial No. 95,706.

T 0 all whom it may concern:

Be it known that I, J Arms Renens, citizen of the United States,residing at Philadelphia, in the county of Philadelphia and 5 State ofPennsylvania, have invented cel tain new and useful Improvements inBoiler and other Furnaces, of which the following is n specification.

My invention relates to furnaces of the type shown in my Patent#1,171,803, dated February 15, 1916, and characterized by the inclusionof a hopper, a fuel feeder, a stationary head block, forming the bottomof a coking zone, a grate having reciprocatory stepped hollow bars, arest grate, and means for removing ashes from the furnace, The Same typeof furnace is shown in another up )licatlon of even date herewith.

he present improvements involve the construction of the upper end of thegrate bars und the contiguous head block; the construction of thelowermost sections of the grate bars; the rest rate, and means forpreventing the accumu ation of clinlcer.

In the drawings-Figure l represents a vertical Section of the grate;Figs. 2 and 3 represent upper and lower portions of the grate; Fig. -lis a view of the perforated steam supply pipes appearing in Fig. 1; Fig.5 is a perspective vlew showing the upper and lower parts of one of thegrate bars with the stepped plates removed; Fig. 6 represents sectionsof the upper stepped plate of the grate; and Figs. 7 and S'representsections of the lower end of the grate.

The grabe bars A are arranged parallel and are 'composed of perforatedstepped secltions a, as in my Previous2 construction. They 4are adaptedto reciprocate independently, and toj,receive coked fuel from theStetloxmry heed block B under which their upper ends exlzelid.l C is thebottom of the fuel ho per fromwhich the fuel is expelled by the elfeeder .(not shown). f a' of each of the etebars is rn'ade o "e othersteps', and its ront Wall a is perforated, the perforations beindesignated a'Q ,The -u er wall is imper crate. 4The is so placed astoalway's form with the upper end of the grate bar ather step a asthegrate boris reciprocated, but never entirely disappears, as ris the casein the construction shown in my Acom anion application. In consequenceof this arrangement,

rester heightA than other steps `of t e fur-A Whicli isnarrowed andwidened. v has,4

hepetofor4 constructed, and provided lt'gyith w ithe sheet of fuelslowly impelled over the head block B by the fuel feeder, findstemporary lodgment on the step a, from which 1U The increments of dis- Ait is partially dislodged at each reciprocation of the grate. lodgedfuel drop past the openings a, and then find their way over the grate inthe same manner as in my earlier construction. I have by experimentationfound that it is desirable when some kinds of fuel are employed, andespecially if the fuel be wet, to cause a leading increment thereof toseparate or draw away from a following increment, in order that theradiant heat may gain access to and affect a large number of the fuelparticles, and this, I have found, may be well accomplished by the meansjust described. It will be observed, that the sheet offuel passing overthe step c4, anddown over the next step a, of the grate bar, is notbodily agitated, but only, separated by gravity as to the leading andfollowing incrementsY above Inentloned. I `urthermore, as the feedin ofthe sheet of fuel is extremely slow, t e opening up of the intersticesis very gradual until the time arrives for the gravitativeA separation,which `causes a transverse rift to appear, thereby 'subjecting more ofthe particles to the radiant heat. More air is required etthis stage ofthe operation,l and this is su plied through openings as. I find that te separation, without a mass disturbance of the fuel, is remarkablyeffective in securing a perfect combustion and the consequentelimination of smoke which, in4 many paces, is due to an `over-supply ofthe gaseous products of destructive distillation and` a relatively smallsupply of air. The height4 of the uppermost step of the grate secinfmVis to be determined by theeha-racter an condition of the fuel, but Ihave made the height six inches. The normal width of the step at4 may beabout three and one-half:

` inches, and this width'isincreasedby fro one-half Aan inch to threeand onmlf inches when the rete bar reeiprocates. l

rate sections' are" abol'xt oneand one-half inies high, and about twoinches Wide. t

The rest grate I have narrowdrlldl" have dispensed with the slotstllerecif,v round ho s d which preventxthe pa-ssagqof vunconsumedmertieles of fuel. A steam pipe d jdeliveps steam to the spacebelow and furi, 'f'

through the rest grate, and the steam. bosides aetinpr to broalf uprlinkers. tends to keep the openings clear. The rest grate protected bya water beam ll, snob as is described in my eompanion application.

(')ther steam pipes F, perforated at f, 'led from a common supply pipeIl", deliver steam laterally into the hollow grate bars A. This steamflows, not only through the open-v ings a at the tops of the grate bars,l ut over the edges el ofthe trough-like portions of said bars, and upbetween the bars, there being spaces e there for the exit olt air underforced draft, as shown at e in my ending application, Serial #$28,742.filed ay 17, 1915. The steam, therefore, uniN formly distributed to allparts of the grate areal` the result beingl the breaking up of tbcclinkers throughout that `area by tht` cooling effect of the steam whiebis ol" a much lower temperature than the lrangible elinkei's.

The grate bars are each provided u ilh a romovahle aslnpushing plate (t.perforated at g', the upper edge g olf which eonstitntes one half of thetop surface of the lowermost step of the bar, the otherl half of thesurface being formed by a projecting perfo rated flange g2 of a gratesection g, that has grooves g4 in its edge. The plate G is secured tothe hollow grate section by lugs gf', that engage flanges g/Fon saidhollow grate section. The steam pipes F have caps f slotted at f2 forthe emission of steam toward the openings g', the object being to supplysteam to this part of the grate, :mst as it is supplied to the otherportions thereof for the purpose of breaking up the elinker. H is anLbeam covered by a pro'- tecting plate J supporting the rest grate l) atone edge, the other edge being supportml bythe waterbeam E.

Having thus fully dcseribedY my invention what I claim is 1. Thecombination with a stepped recio roeatory grate, of a stationary headblock disposed at the bottom of a coking chamber,

the .upper step of the grate being of greater height than the othersteps, and the grate actuating mechanism being so adjustedas to alwaysexpose a fuel supporting surface of the upper step.

it. 'lhe combination with a stepped reciproi-.atory grato havingalternately acting sections, ol a stationary head block disposed at thebottom ol" the coking chamber, the upper step of the grato being ofgreater bright than the other steps, and the grate artuating;r mechanismbeing so adjusted as to alwaysI expose a fuel sul'iporting surface ofthe upper step.

5l. The combinatioli of an inclined reciprocating grate, a rest gratesituated at the lower end of said inclined grate and adapted tounobstructively discharge material rearward, the lower end ofthe-inclined lfrate being perforated, vertically7 disposed and shaped toact as an ash pusher.

l. A lower grate scf-.tion Comprising two parts1 one of which is asteiiped plate having a perforated flange and the other is a. vcr--tical perforated plate fitting said flange.

I. The rombination with a grate baring hollow spared and perforatedbars, of steam .supply pipe-s adapted to supply steam to theprrl'orations in and the spares between said bars and means forsupplying air under pressure to said bars.

(3. The combination with the vertically ar ranged perforated lowersection of a grate constituting an ash pusher, oi a steam pipe *fordelivering steam to and through the perforations, and a rest gratedisposed adjacent said lower sections.

7. A foot grate in combination with a Supportingbeam, a protecting platefor said beam7 and a water beam supporting an edge of said foot grate.

S. The combination with a furnace, of an inclined stepped grate, theuppermost step being of l rreater height than the other steps, means foruniformly supplying steam to all parts of the grate area, a rest grate,a perforated plate constituting 'an ash pusher disposed at the lower endof the grate and means .for supplying steam through ,the ash pusher.

In testimony whereof I my signature 100 in preseneeof a witness.

JAMES Eriadan.-

Witness: y

J. WV. Cassmy.

